Ok, you mean the spouts of heart troubles; Mine only seemed to last a few days at a time I believe.
When my symptoms were at it's peak, I would wake up in the night with all of my extremities completely numb to the point where it would take a half hour for them to regain circulation, and my chest would be extremely tight.
I'm wondering how food grade, hydrogen peroxide diluted in water would help your situation. No matter what you do during the congestion scenario, lack of oxygen is always present, so by helping mitigate that problem, it may help things.